{-# LANGUAGE OverloadedStrings, RecordWildCards #-}

import qualified Jsonifier as J
import qualified Data.ByteString.Char8


{-|
Outputs the following:

> {"name":"Metallica","genres":[{"name":"Metal"},{"name":"Rock"},{"name":"Blues"}]}
-}
main =
  Data.ByteString.Char8.putStrLn (J.toByteString (artistJson metallica))

metallica :: Artist
metallica =
  Artist "Metallica" [Genre "Metal", Genre "Rock", Genre "Blues"]


-- * Model
-------------------------

data Artist =
  Artist { artistName :: Text, artistGenres :: [Genre] }

data Genre =
  Genre { genreName :: Text }


-- * Encoders
-------------------------

artistJson :: Artist -> J.Json
artistJson Artist{..} =
  J.object [
    ("name", J.textString artistName),
    ("genres", J.array (fmap genreJson artistGenres))
    ]

genreJson :: Genre -> J.Json
genreJson Genre{..} =
  J.object [
    ("name", J.textString genreName)
    ]